What is the maximum permissible distance for a vent from a toilet fixture?

The maximum permissible distance for a vent from a toilet fixture is 6 feet. This is based on plumbing codes that ensure adequate venting for proper drainage and to prevent siphoning of traps. Vents are essential for allowing air to flow into the plumbing system, which helps maintain the necessary pressure balance when water flows down the drain. If the vent is placed more than 6 feet away from the fixture, the risk of drainage issues increases because the waste may not drain properly due to a lack of sufficient airflow. Therefore, adhering to this distance is critical for maintaining optimal plumbing system function and preventing future clogs or backup problems.